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DATAMONGO-1843 - Fix parameter shadowing in ArrayOperators reduce.

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Original pull request: #526.
This commit is contained in:
Christoph Strobl
2018-01-16 10:06:38 +01:00
committed by Mark Paluch
parent cc9a3ac8da
commit 704524d7f4
2 changed files with 30 additions and 8 deletions
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14
spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/aggregation/ArrayOperators.java
View File

@@ -229,8 +229,8 @@ public class ArrayOperators {
@Override
public Reduce startingWith(Object initialValue) {
return (usesFieldRef() ? Reduce.arrayOf(fieldReference) : Reduce.arrayOf(expression))
.withInitialValue(initialValue).reduce(expression);
return (usesFieldRef() ? Reduce.arrayOf(fieldReference)
: Reduce.arrayOf(ArrayOperatorFactory.this.expression)).withInitialValue(initialValue).reduce(expression);
}
};
}
@@ -1104,12 +1104,10 @@ public class ArrayOperators {
/**
* Start creating new {@link Reduce}.
*
* @param expression must not be {@literal null}.
* @param arrayValueExpression must not be {@literal null}.
* @return
*/
public static InitialValueBuilder arrayOf(final AggregationExpression expression) {
Assert.notNull(expression, "AggregationExpression must not be null");
public static InitialValueBuilder arrayOf(final AggregationExpression arrayValueExpression) {
return new InitialValueBuilder() {
@@ -1124,14 +1122,14 @@ public class ArrayOperators {
public Reduce reduce(AggregationExpression expression) {
Assert.notNull(expression, "AggregationExpression must not be null");
return new Reduce(expression, initialValue, Collections.singletonList(expression));
return new Reduce(arrayValueExpression, initialValue, Collections.singletonList(expression));
}
@Override
public Reduce reduce(PropertyExpression... expressions) {
Assert.notNull(expressions, "PropertyExpressions must not be null");
return new Reduce(expression, initialValue, Arrays.<AggregationExpression> asList(expressions));
return new Reduce(arrayValueExpression, initialValue, Arrays.asList(expressions));
}
};
}

24
spring-data-mongodb/src/test/java/org/springframework/data/mongodb/core/aggregation/ProjectionOperationUnitTests.java
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@@ -32,10 +32,13 @@ import org.hamcrest.Matchers;
import org.junit.Test;
import org.springframework.data.domain.Range;
import org.springframework.data.mongodb.core.DocumentTestUtils;
import org.springframework.data.mongodb.core.aggregation.ArrayOperators.Reduce;
import org.springframework.data.mongodb.core.aggregation.ArrayOperators.Reduce.PropertyExpression;
import org.springframework.data.mongodb.core.aggregation.ArrayOperators.Reduce.Variable;
import org.springframework.data.mongodb.core.aggregation.ArrayOperators.Slice;
import org.springframework.data.mongodb.core.aggregation.ConditionalOperators.Switch.CaseOperator;
import org.springframework.data.mongodb.core.aggregation.ProjectionOperation.ProjectionOperationBuilder;
import org.springframework.data.mongodb.core.aggregation.StringOperators.Concat;
import org.springframework.data.mongodb.core.aggregation.VariableOperators.Let.ExpressionVariable;
/**
@@ -1573,6 +1576,27 @@ public class ProjectionOperationUnitTests {
"{ $project : { \"results\": { $reduce: { input: \"$probabilityArr\", initialValue: { \"sum\" : 5 , \"product\" : 2} , in: { \"sum\": { $add : [\"$$value.sum\", \"$$this\"] }, \"product\": { $multiply: [ \"$$value.product\", \"$$this\" ] } } } } } }")));
}
@Test // DATAMONGO-1843
public void shouldRenderReduceWithInputAndInExpressionsCorrectly() {
Document exprected = Document.parse(
"{ \"$project\" : { \"results\" : { \"$reduce\" : { \"input\" : { \"$slice\" : [\"$array\", 5] }, \"initialValue\" : \"\", \"in\" : { \"$concat\" : [\"$$value\", \"/\", \"$$this\"] } } } } }");
Reduce reduceEntryPoint = Reduce.arrayOf(Slice.sliceArrayOf("array").itemCount(5)) //
.withInitialValue("") //
.reduce(Concat.valueOf("$$value").concat("/").concatValueOf("$$this"));
Reduce arrayEntryPoint = ArrayOperators.arrayOf(Slice.sliceArrayOf("array").itemCount(5)) //
.reduce(Concat.valueOf("$$value").concat("/").concatValueOf("$$this")) //
.startingWith("");
assertThat(project().and(reduceEntryPoint).as("results").toDocument(Aggregation.DEFAULT_CONTEXT),
Matchers.is(exprected));
assertThat(project().and(arrayEntryPoint).as("results").toDocument(Aggregation.DEFAULT_CONTEXT),
Matchers.is(exprected));
}
@Test // DATAMONGO-1548
public void shouldRenderZipCorrectly() {